T-MATS: Gear Box Library Block
This block simulates the performance of a gear box using basic gear properties.
Gear Ratio = NmechA/NmechB = TrqB/TrqA

Gear box Inputs:

Gear box Input	Description
TorqA	Torque at gearbox side A [lbf*ft]
NmechB	Mechanical shaft speed at gearbox side B [rpm]

Gear box Outputs:

Gear box Output	Description
NmechA	Mechanical shaft speed at gearbox side A [rpm]
TorqB	Torque at gearbox side B [lbf*ft]

Gear box Mask Variables:

Gear box Mask Variable	Description
R_M	Gear Ratio [frac]
Eff_M	Gear box efficiency from A to B [frac]